As it turns out, squids had been spawning and seemingly getting stuck on the outer edges of the spawn chunks and never being unloaded. Hundreds of squids were out there, forming a wall around the outer edge of the always loaded chunks around spawn.
- 2015-08-21_13.57.49.png (50.25 KiB) Viewed 2648 times
To fix this, I have replaced all water with beautiful blue glass in the chunks in the always loaded region, plus a one-chunk border. This gives squids no more room to spawn in the spawn chunks and should allow them to spawn elsewhere.
- 2015-08-21_19.10.00.png (107.73 KiB) Viewed 2648 times
Early reports seem to suggest an abundance of Squids, it is unclear whether this affects other mob spawning but I would assume there'll be an increase generally for mob spawns too.
